diff options
Diffstat (limited to 'drivers/media/dvb/frontends/s5h1409.c')
| -rw-r--r-- | drivers/media/dvb/frontends/s5h1409.c | 48 |
1 files changed, 38 insertions, 10 deletions
diff --git a/drivers/media/dvb/frontends/s5h1409.c b/drivers/media/dvb/frontends/s5h1409.c index 0e2f61a8978..f71b06221e1 100644 --- a/drivers/media/dvb/frontends/s5h1409.c +++ b/drivers/media/dvb/frontends/s5h1409.c @@ -631,9 +631,9 @@ static void s5h1409_set_qam_interleave_mode_legacy(struct dvb_frontend *fe) } /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ -static int s5h1409_set_frontend(struct dvb_frontend *fe, - struct dvb_frontend_parameters *p) +static int s5h1409_set_frontend(struct dvb_frontend *fe) { + struct dtv_frontend_properties *p = &fe->dtv_property_cache; struct s5h1409_state *state = fe->demodulator_priv; dprintk("%s(frequency=%d)\n", __func__, p->frequency); @@ -642,12 +642,12 @@ static int s5h1409_set_frontend(struct dvb_frontend *fe, state->current_frequency = p->frequency; - s5h1409_enable_modulation(fe, p->u.vsb.modulation); + s5h1409_enable_modulation(fe, p->modulation); if (fe->ops.tuner_ops.set_params) { if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); - fe->ops.tuner_ops.set_params(fe, p); + fe->ops.tuner_ops.set_params(fe); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } @@ -879,7 +879,36 @@ static int s5h1409_read_snr(struct dvb_frontend *fe, u16 *snr) static int s5h1409_read_signal_strength(struct dvb_frontend *fe, u16 *signal_strength) { - return s5h1409_read_snr(fe, signal_strength); + /* borrowed from lgdt330x.c + * + * Calculate strength from SNR up to 35dB + * Even though the SNR can go higher than 35dB, + * there is some comfort factor in having a range of + * strong signals that can show at 100% + */ + u16 snr; + u32 tmp; + int ret = s5h1409_read_snr(fe, &snr); + + *signal_strength = 0; + + if (0 == ret) { + /* The following calculation method was chosen + * purely for the sake of code re-use from the + * other demod drivers that use this method */ + + /* Convert from SNR in dB * 10 to 8.24 fixed-point */ + tmp = (snr * ((1 << 24) / 10)); + + /* Convert from 8.24 fixed-point to + * scale the range 0 - 35*2^24 into 0 - 65535*/ + if (tmp >= 8960 * 0x10000) + *signal_strength = 0xffff; + else + *signal_strength = tmp / 8960; + } + + return ret; } static int s5h1409_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) @@ -896,13 +925,13 @@ static int s5h1409_read_ber(struct dvb_frontend *fe, u32 *ber) return s5h1409_read_ucblocks(fe, ber); } -static int s5h1409_get_frontend(struct dvb_frontend *fe, - struct dvb_frontend_parameters *p) +static int s5h1409_get_frontend(struct dvb_frontend *fe) { + struct dtv_frontend_properties *p = &fe->dtv_property_cache; struct s5h1409_state *state = fe->demodulator_priv; p->frequency = state->current_frequency; - p->u.vsb.modulation = state->current_modulation; + p->modulation = state->current_modulation; return 0; } @@ -967,10 +996,9 @@ error: EXPORT_SYMBOL(s5h1409_attach); static struct dvb_frontend_ops s5h1409_ops = { - + .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, .info = { .name = "Samsung S5H1409 QAM/8VSB Frontend", - .type = FE_ATSC, .frequency_min = 54000000, .frequency_max = 858000000, .frequency_stepsize = 62500, |